Can. 1124 Without express permission of the
competent authority, a marriage is prohibited between two baptized persons of
whom one is baptized in the Catholic Church or received into it after baptism
and has not defected from it by a formal act and the other of whom is enrolled
in a Church or ecclesial community not in full communion with the Catholic
Church.

Can. 1125 The local ordinary can grant a
permission of this kind if there is a just and reasonable cause. He is not to
grant it unless the following conditions have been fulfilled:

1/ the Catholic party is to declare that he or she
is prepared to remove dangers of defecting from the faith and is to make a
sincere promise to do all in his or her power so that all offspring are
baptized and brought up in the Catholic Church;

2/ the other party is to be informed at an
appropriate time about the promises which the Catholic party is to make, in
such a way that it is certain that he or she is truly aware of the promise and
obligation of the Catholic party;

3/ both parties are to be instructed about the
purposes and essential properties of marriage which neither of the contracting
parties is to exclude.

Can. 1126 It is for the conference of bishops to
establish the method in which these declarations and promises, which are always
required, must be made and to define the manner in which they are to be
established in the external forum and the non-Catholic party informed about
them.

Can. 1127 §1. The prescripts of ⇒ can. 1108 are to be observed for the form to be used in a mixed
marriage.

Nevertheless, if a Catholic party contracts marriage
with a non-Catholic party of an Eastern rite, the canonical form of the
celebration must be observed for liceity only; for validity, however, the
presence of a sacred minister is required and the other requirements of law are
to be observed.

§2. If grave diYculties hinder the observance of
canonical form, the local ordinary of the Catholic party has the right of
dispensing from the form in individual cases, after having consulted the
ordinary of the place in which the marriage is celebrated and with some public
form of celebration for validity. It is for the conference of bishops to
establish norms by which the aforementioned dispensation is to be granted in a
uniform manner.

§3. It is forbidden to have another religious
celebration of the same marriage to give or renew matrimonial consent before or
after the canonical celebration according to the norm of §1. Likewise, there is
not to be a religious celebration in which the Catholic who is assisting and a
non-Catholic minister together, using their own rites, ask for the consent of
the parties.

Can. 1128 Local ordinaries and other pastors of
souls are to take care that the Catholic spouse and the children born of a
mixed marriage do not lack the spiritual help to fulfill their obligations and
are to help spouses foster the unity of conjugal and family life.

Can. 1129 The prescripts of cann.
⇒ 1127 and ⇒ 1128 must be applied
also to marriages which the impediment of disparity of cult mentioned in
⇒ can. 1086, §1 impedes.